Actually, I'd have suggested interactive books, but we've had those for over 20 years (as interactive fiction, e.g. ZORK and its descendants).
Or textbooks or reference books that update themselves continuously... oh, wait, that's Wikipedia....
One idea might be "layered" books, where you can choose how much description you get vs. action scenes, for example... and when the heroine sits down to a delicious meal, the recipe is only a click away.
